Controller Based WLANs

How to identify in which channel the APs are broadcasting with max EIRP

Question: How to identify in which channel the APs are broadcasting with max EIRP?

 

Environment: We may come across a situation that we want to make one or two Aps has to be broadcasted with Max EIRP however other APs in the location should use the Tx power mentioned in the ARM limit.

 

We may come across a situation that we want to make one or two Aps has to be broadcasted with Max EIRP however other APs in the location should use the Tx power mentioned in the ARM limit. Due to regulatory constraints the APs cannot broadcast with maximum EIRP even though Min Tx power in ARM set to Max vlaue.

show ap bss-table ap-name "testap"
 
 
fm (forward mode): T-Tunnel, S-Split, D-Decrypt Tunnel, B-Bridge (s-standard, p-persistent, b-backup, a-always)
 
Aruba AP BSS Table
------------------
bss                ess         port  ip             phy   type  ch/EIRP/max-EIRP  cur-cl  ap name   in-t(s)  tot-t       mtu   acl-state  acl  fm
---                ---         ----  --             ---   ----  ----------------  ------  -------   -------  -----       ---   ---------  ---  --
00:1a:1e:90:ee:14  Aruba      N/A   172.18.112.57  a-HT  ap    161/16/16         0       testap  0        4h:24m:17s  1500  -          68   T
00:1a:1e:90:ee:12  A-GUEST   N/A   172.18.112.57  a-HT  ap    161/16/16         0       testap  0        4h:24m:17s  1500  -          60   T
00:1a:1e:90:ee:13  A-internal     N/A   172.18.112.57  a-HT  ap    161/16/16         0       testap  0        4h:24m:17s  1500  -          1    T
00:1a:1e:90:ee:11  A-SECURE  N/A   172.18.112.57  a-HT  ap    161/16/16         1       testap  0        4h:24m:17s  1500  -          1    T
00:1a:1e:90:ee:10  A-test          N/A   172.18.112.57  a-HT  ap    161/16/16         0       testap 0        4h:24m:17s  1500  -          70   T

In the above output the max EIRP is set to 16 however the min-tx power in ARM is set to 18.

The requirement is make this AP to broadcast with max tx power.

The power and channel limits are based on regulatory domain. Consider this Ap is provisioned in US regulatory domain profile and below command output will show the max allowed EIRP.
 
#show ap allowed-max-EIRP ap-name <Ap-name> country-code US

(Aruba) #show ap allowed-max-EIRP ap-name 6c:f3:7f:c7:41:bc country-code us

 

 

 

Max EIRP setting for Country Code US Country United States and AP type AP-125

 

-----------------------------------------------------------------------------

 

Channel  1   2   3   4   5   6   7   8   9   10  11  12  13  14  36  40  44  48  52  56  60  64  100  104  108  112  116  120  124  128  132  136  140  144  149  153  157  161  165

 

-------  -   -   -   -   -   -   -   -   -   --  --  --  --  --  --  --  --  --  --  --  --  --  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---

 

b        24  24  24  23  23  23  23  23  23  23  23  *   *   *   *   *   *   *   *   *   *   *   *    *    *    *    *    *    *    *    *    *    *    *    *    *    *    *    *

 

g/a      19  19  19  19  19  19  19  19  19  19  19  *   *   *   20  20  20  20  20  20  20  20  21   21   21   21   21   *    *    *    22   22   22   *    17   17   16   16   16

 

HT 20    21  21  21  21  21  21  21  21  21  21  21  *   *   *   21  20  20  20  20  20  20  20  21   21   21   21   21   *    *    *    22   22   22   *    16   16   16   16   16

 

HT 40    21  21  21  21  21  21  21  21  21  21  21  *   *   *   20  20  20  20  19  19  20  20  20   20   21   21   *    *    *    *    20   20   20   *    16   16   15   15   15

 

 

From the above command we can find out which channel has the max EIRP and set that channel for this AP statically by placing this AP in Ap-specific by disabling ARM.

 

 

We may come across a situation that we want to make one or two Aps has to be broadcasted with Max EIRP however other APs in the location should use the Tx power mentioned in the ARM limit. Due to regulatory constraints the APs cannot broadcast with maximum EIRP even though Min Tx power in ARM set to Max vlaue.

show ap bss-table ap-name "testap"


fm (forward mode): T-Tunnel, S-Split, D-Decrypt Tunnel, B-Bridge (s-standard, p-persistent, b-backup, a-always)

Aruba AP BSS Table
------------------
bss ess port ip phy type ch/EIRP/max-EIRP cur-cl ap name in-t(s) tot-t mtu acl-state acl fm
--- --- ---- -- --- ---- ---------------- ------ ------- ------- ----- --- --------- --- --
00:1a:1e:90:ee:14 Aruba N/A 172.18.112.57 a-HT ap 161/16/16 0 testap 0 4h:24m:17s 1500 - 68 T
00:1a:1e:90:ee:12 A-GUEST N/A 172.18.112.57 a-HT ap 161/16/16 0 testap 0 4h:24m:17s 1500 - 60 T
00:1a:1e:90:ee:13 A-internal N/A 172.18.112.57 a-HT ap 161/16/16 0 testap 0 4h:24m:17s 1500 - 1 T
00:1a:1e:90:ee:11 A-SECURE N/A 172.18.112.57 a-HT ap 161/16/16 1 testap 0 4h:24m:17s 1500 - 1 T
00:1a:1e:90:ee:10 A-test N/A 172.18.112.57 a-HT ap 161/16/16 0 testap 0 4h:24m:17s 1500 - 70 T

In the above output the max EIRP is set to 16 however the min-tx power in ARM is set to 18.

The requirement is make this AP to broadcast with max tx power.

The power and channel limits are based on regulatory domain. Consider this Ap is provisioned in US regulatory domain profile and below command output will show the max allowed EIRP.

#show ap allowed-max-EIRP ap-name <Ap-name> country-code US

(Aruba) #show ap allowed-max-EIRP ap-name 6c:f3:7f:c7:41:bc country-code us

Max EIRP setting for Country Code US Country United States and AP type AP-125
-----------------------------------------------------------------------------
Channel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165
------- - - - - - - - - - -- -- -- -- -- -- -- -- -- -- -- -- -- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
b 24 24 24 23 23 23 23 23 23 23 23 * * * * * * * * * * * * * * * * * * * * * * * * * * * *
g/a 19 19 19 19 19 19 19 19 19 19 19 * * * 20 20 20 20 20 20 20 20 21 21 21 21 21 * * * 22 22 22 * 17 17 16 16 16
HT 20 21 21 21 21 21 21 21 21 21 21 21 * * * 21 20 20 20 20 20 20 20 21 21 21 21 21 * * * 22 22 22 * 16 16 16 16 16
HT 40 21 21 21 21 21 21 21 21 21 21 21 * * * 20 20 20 20 19 19 20 20 20 20 21 21 * * * * 20 20 20 * 16 16 15 15 15

From the above command we can find out which channel has the max EIRP and set that channel for this AP statically by placing this AP in Ap-specific by disabling ARM.
 

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Revision #:
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Last update:
‎11-09-2014 01:52 AM
 
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